The phrase "mere product" is correct and can be used in written English.
Example: The company claims that their product is not just a mere product, but a life-changing solution.
The authors emphasize that plant-based production platforms represent a whole array of different strategies that need to be carefully evaluated, in terms of not only mere product yield, but also product quality, production scalability, costs, and cGMP compliance.
That sounds as if it goes well beyond mere product design.
Much of the painting and sculpture one sees coming from China is mere product.
Parker knows perfectly well that Melville was not a mere product - however complex - of his milieu.
It will just mean I got tired of exercising, and no mere product will be at fault.
It would be easy to diminish the feat — as many have with Jackson — as the mere product of a loaded roster.
Are we all aimless beings, mere products of chance, here merely to consume, grind out a living and die?
Companies are increasingly selling functionalities of integrated solutions of products and services instead of selling mere products.
Embryonic stem cell research is wrong because it destroys innocent human life by treating vulnerable human beings as mere products to be harvested.
And anyway, if we are all mere products of our culture, there can be no exemplary lives – which rather does away with the need for biography.
But for Sir Hugh's "realist" critics, all this will be imaginary: Islamist movements are "hollow" - mere products of sinister manipulation, deceit and brainwashing.
